The ST-System is a dedicated system, specially developed for non standard sizes. Small or large, the fittings are suitable for all diameters between DN40 – DN2200. Corning's 720 series ST (single tube) fiber connectors and adapters offer superior performance and high repeatability. These products are fully intermate able with all standard ST products and deliver very high stability under a wide range of applications and conditions. What temperatures can the ST adapter be used in? The ST adapter can be used in temperatures as low as -40°C and up to 75°C. The ST-System can be used for. FiberSource ST to ST Adapter with Zirconia, Alignment Sleeve, Metal Body, DD-Hole Mount Amphenol ST to ST Single Mode Adapter, Zirconia Alignment Sleeve, Black Polymer Body, DD-Hole Mount Senko ST Adapter Bronze DD-Hole - Metal Senko ST Adapter Zirconia DD-Hole - Metal Senko ST Duplex Adapter. The SANWA ST Adapters are robust connectors specifically designed for the alignment and coupling of ST fiber optic connectors. Made of durable metal, they offer enhanced mechanical strength, longevity, and resistance against environmental challenges. Its design facilitates smooth integration and im roves both contemporary and older fiber optic networks. The compact structure of these adapters allows network operators to reduce costs by conserving spa environments, suitable for both indoor.